Who cares if he doesn't train. Maybe he's in a wheelchair but still wants to learn the art and feel a part of something or is overweight. He has an interest in the subject and that should be encouraged and we don't have to be douches about it.
That Meerkatsu guy did exactly what he's doing, just watched videos for 6 months and didn't start training till he lost 21 lbs and was in better condition.
"What happened is in late 2006 I started watching a lot of MMA and loved the concept that if you were smart and knew BJJ you didn't have to be as physicaly strong - I mean seriously, I was never in shape and got bullied a lot during my school years, then suddenly you get the idea that there's a way of fighting that can negate physical inferiority...that was the spark right there and then.
But being as fat as I was I didn't want to be a burden to anyone else in the class so I spent the next 6 months losing 1.5 stone and the whole time I was watching and reading about BJJ as much as I could, really treating it like an academic subject...all before I ever stepped on the mat."